23011543 has 2 divisors, whose sum is σ = 23011544. Its totient is φ = 23011542.

The previous prime is 23011531. The next prime is 23011553. The reversal of 23011543 is 34511032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23011543 - 2⁹ = 23011031 is a prime.

It is a super-2 number, since 2×23011543² = 1059062222481698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23011543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23011553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11505771 + 11505772.

It is an arithmetic number, because the mean of its divisors is an integer number (11505772).

Almost surely, 2^23011543 is an apocalyptic number.

23011543 is a deficient number, since it is larger than the sum of its proper divisors (1).

23011543 is an equidigital number, since it uses as much as digits as its factorization.

23011543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 23011543 is about 4797.0348132987. The cubic root of 23011543 is about 284.4342650380.

Adding to 23011543 its reverse (34511032), we get a palindrome (57522575).

It can be divided in two parts, 2301 and 1543, that added together give a square (3844 = 62²).

The spelling of 23011543 in words is "twenty-three million, eleven thousand, five hundred forty-three".